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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 32 for “"Decapod"”.
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The decapod crustaceans of Iowa
1 PDF file (x, 149 pages)
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Dactyls reveal evolutionary patterns in decapod crustaceans
… potential and uses in foraging and defense, decapod crustacean dactyls (movable fingers of claws) are potentially excellent test subjects for an ongoing debate concerning the relative importance of top-down (predators) and bottom-up (prey) controls on morphologic diversification and …
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Functional implications of the neuromuscular transform in decapod crustacean locomotion
All animals face the same basic challenges in controling movement through their environment. The central nervous system must activate and effectively control muscle fibers capable of accomplishing the behavior. For multi functional muscles, an array of muscle fiber types must be selectively …
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Ecophysiological adaptations to salinity variation in early life-history stages of decapod crustaceans
Decapod crustaceans which successfully invade habitats with hypo-osmotic conditions must show strong hyper-osmoregulatory capacities, stable growth also at reduced salinities, strongly differentiated ion-transporting tissues, high activities of Na+-K+-ATPase, and an enhanced expression of mRNA …
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Bioturbation in Supratidal Carbonates: Georadar Characterization of the Patterns and Structure of Decapod Burrows
… geophysical investigation of three decapod species inhabiting adjacent coastal biotopes on San Salvador Island. Extensive (>2 km) 800 MHz georadar surveys captured a diverse suite of >120 burrows of ghost (Ocypode quadrata), blackback (Gecarcinus lateralis) and blue (Cardisoma …
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Aspects of the sensitivity of juvenile Jasus lalandii and decapod excitable tissue to the water soluble fraction of crude oil
… investigations into the level of excitability of decapod neurons after exposure to the WSF, indicated a rapid increase, followed by a decrease in excitability, to a level below that of unexposed tissue. 6. Recommendations are made as to how the findings of this study could be applied to enhance …
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Aspects of the physiology of decapod crustaceans with particular reference to the live marketing of Cancer pagurus (L) and Necora puber (L)
The crabs Cancer pagurus (L) and Necora puber (L) are exported live, in bulk, from the UK to various continental countries. The success of this relatively new trade is marred by the incidence of mortalities and impaired quality of the delivered product. These studies addressed various causes - …
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Chemical communication and its ecological consequence in the Lysmata shrimp
… mediates mating behaviour of some decapod crustaceans. Contact pheromone (an insoluble coating on the body surface) has been proposed but not confirmed to be used by male decapod crustaceans to detect females. Here we report for the first time the involvement of both distance and …
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Patterns of Diurnal Vertical Distribution and Dispersal-Recruitment Mechanisms of Decapod Crustacean Larvae and Postlarvae in the Chesapeake Bay, Virginia and Adjacent Offshore Waters
… and economically important populations of decapod crustaceans. Vertical positioning in the water column plays a major role in the particular strategies of retention or expulsion with immigration.</p> <p>The present study was undertaken to investigate variations in vertical distribution …
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Orientation dependence of the acoustic backscatter for elongated zooplankton
… the acoustic backscatter directivity pattern of decapod shrimp (Palaemonetes vulgaris) is examined versus acoustic frequency. Using the distorted wave Born approximation (DWBA) and the geometry of a prolate spheroid, an analytic formula for the backscatter cross section as a function of …
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Fish and decapod community structure in estuarine habitats of the New Orleans Land Bridge, including a description of the life cycle of tarpon (Megalops atlanticus) in southeastern Louisiana
… months, I collected 65,000 fishes and decapods comprising over 65 species from the New Orleans Land Bridge, an estuarine salt marsh. My research details the distribution of nekton across five contiguous but geomorphically different regions, which I defined as “Areas”. This factor “Area” …
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Modeling central pattern generators in sand crabs
… anomalous digging behaviour in t he anomuran decapod crust acean Emerita analoga. At the onset of a dig, the fourth (hindmost) right and left legs stroke together about half a cycle out of phase wit h the uropods (last abdominal appendages). During digging, however , the phase relationships …
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Palaeoecology and taxonomy of the macrobenthic fauna from the Upper Cretaceous Ajlun Group, southern Jordan
… each. Additionally, at least two species of decapod crustaceans were found. One bivalve species is new: Anthonya jordanica from Cenomanian claystones of the eastern study area. 41 quantitative samples of the benthic invertebrate fauna were grouped into nine associations and three assemblages …
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Invertebrate plankton assemblages in the surf zones of St. Lucia and Mhlathuze Estuaries, KwaZulu-Natal, South Africa
… The meroplankton composed of polychaetes and decapod larvae which dominated this group. Decapod larvae included pagurid, brachyuran and shrimp-like forms. Benthoplanktonic crustaceans sampled from these surf zones included surf zone/beach mysids of the genus Gastrosaccus, the isopod Grolana …
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Macrogeographic Genetic Structure in Acanthephyra curtirostris (Oplophoridae)
… about the nature of microsatellite arrays in decapod crustaceans. The microsatellite repeats isolated from <em>A. curtirostris</em> - the first reported from a caridean shrimp - were found, like those in other decapods, to be abundant, generally long, and extraordinarily complex when compared …
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Crustacean phylogenetic systematics and opsin evolution
… studies of two crustacean groups (Mysidae and Decapoda) were completed. Studies of Mysidae utilized 16S mtDNA, and 18S and 28S rDNA to reconstruct phylogenetic relationships and assess newly developed Bayesian methods of assessing pattern heterogeneity. Using this suite of genetic markers, …
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THE STATUS OF OTTERS (CARNIVORA : MUSTELIDAE : LUTRINAE) IN SINGAPORE AND MALAYSIA, AND THE DIET OF THE SMOOTH OTTER (LUTROGALE PERSPICILLATA) IN PENANG, WEST MALAYSIA
… of fish (100% occurrence) and partly of decapod crustaceans (24% occurrence). Besides this, no other animal components were found in the diet. There was also no evidence of seasonality. This contrasts with the other common species of otter in Malaysia, A. cinereus, which appears to feed …
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Neuropeptide hormones from the eyestalks of Jasus Lalandii
… gland complex, situated in the eyestalks of decapod crustaceans, are known to be a source of a variety of neuropeptide hormones that regulate a number of diverse physiological processes. This neuroendocrine complex was investigated in 3 crustacean species, viz. the European shore crab …
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